<template>
  <div>

    <!-- 图片分类区 -->
			<div id="slider" class="mui-slider">
				<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
					<div class="mui-scroll">
						<span 
              :class="['mui-control-item',item.id===0?'mui-active':'']" 
              v-for='item in category' 
              :key='item.id' 
              @tap="getPhotoByCategory(item.id)"
               >
							{{ item.title }} 
						</span>
					</div>
				</div>
			</div>


    <!--跳转到图片详情组件 -->
      <!-- 图片列表区 -->
      <ul class="lazyul">
        <router-link tag="li" v-for="item in photolist" :key="item.id" :to="'/home/photoinfo/'+item.id">
          <img v-lazy="item.img_url">
        </router-link>
      </ul>
	</div>
</template>

<script>
import mui from '../../../lib/mui/js/mui.js'

export default {
  data(){
    return {
      category: [],// 所有的图片分类数据
      photolist:[] //图片列表
    }
  },
  created(){
    this.getPhotoCategory()
    this.getPhotoByCategory(0)
  },
  methods: {
    async getPhotoCategory(){
      // 获取图片数据
      console.log(data);
      const { data } = await this.$http.get("/api/getimgcategory")
      if(data.status === 0){
        // 手动补全分类信息
        data.message.unshift({title: '全部', id: 0})
        this.category = data.message
      }
    },
    async getPhotoByCategory(id){
      // 根据图片分类的Id获取图片的数据
      const { data } = await this.$http.get("/api/getimages/" + id)
      if(data.status === 0) return (this.photolist = data.message);
    },

  },
  mounted() {
    // 当此钩子函数执行的时候，我们才可以进行控件或插件的初始化工作；
    mui(".mui-scroll-wrapper").scroll({
      deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
    });
  }
}
</script>

<style lang="scss" scoped>
.lazyul {
  margin: 0;
  padding: 10px;

  li {
    background-color: #ccc;
    text-align: center;
    box-shadow: 0 0 7px gray;
    position: relative;
    & + li {
      // 这种样式的写法，适合场景： 排除第一个，应用给其它所有的li
      margin-top: 10px;
    }
    img {
      vertical-align: middle;
      width: 100%;
    }
    img[lazy="loading"] {
      width: 40px;
      height: 300px;
      margin: auto;
    }
  }
}

.info {
  position: absolute;
  bottom: 0;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
  max-height: 86px;
  overflow: hidden;
  .info-title {
    font-size: 14px;
  }
  .info-content {
    font-size: 13px;
    text-align: left;
    text-indent: 2em;
  }
}
</style>